AskBgp Class |
Represents a BGP which is a set of Triple Patterns.
Inheritance HierarchyNamespace: VDS.RDF.Query.Algebra
Assembly: dotNetRDF (in dotNetRDF.dll) Version:
SyntaxThe AskBgp type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | AskBgp(IEnumerableITriplePattern) |
Creates a Streamed BGP containing a set of Triple Patterns.
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| AskBgp(ITriplePattern) |
Creates a Streamed BGP containing a single Triple Pattern.
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Properties| Name | Description | |
|---|---|---|
 | FixedVariables |
Gets the enumeration of fixed variables in the algebra i.e. variables that are guaranteed to have a bound value.
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| FloatingVariables |
Gets the enumeration of floating variables in the algebra i.e. variables that are not guaranteed to have a bound value.
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| IsEmpty |
Gets whether the BGP is the emtpy BGP.
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| PatternCount |
Gets the number of Triple Patterns in the BGP.
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| TriplePatterns |
Gets the Triple Patterns in the BGP.
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| Variables |
Gets the Variables used in the Algebra.
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Methods| Name | Description | |
|---|---|---|
| Equals | Determines whether the specified object is equal to the current object. (Inherited from Object.) |
| Evaluate |
Evaluates the BGP against the Evaluation Context.
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 | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
| GetHashCode | Serves as the default hash function. (Inherited from Object.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
| ToGraphPattern |
Converts the BGP back to a Graph Pattern.
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| ToQuery |
Converts the Algebra back to a SPARQL Query.
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| ToString |
Gets the String representation of the Algebra.
(Overrides ObjectToString.) |
RemarksAn Ask BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for ASK queries where we are only concerned with whether a BGP matches and not in the specific solutions.
An Ask BGP can only contain concrete Triple Patterns and/or FILTERs and not any of the other specialised Triple Pattern classes.
See Also